Key reuse for RDMA virtual address space

Details Key reuse for RDMA virtual address space Key reuse for RDMA virtual address space

2007-10-30

2007-10-30

Vaughn, William (Department: 2144)

Electrical computers and digital processing systems: multicomput

Computer-to-computer direct memory accessing

C709S213000, C709S215000, C711S164000

Reexamination Certificate

active

10210725

ABSTRACT:
A system and method for reusing an R_Key associated with InfiniBand virtual address space mapped to local, host, storage. An R_Key is initially assigned by an HCA (Host Channel Adapter) when a host registers a set of local storage buffers. The HCA maps the local buffers to virtual address space and returns the R_Key. When the host augments the mapped local storage by identifying additional buffers, the HCA maps the larger storage area to virtual address space and returns the same R_Key. When the host removes local storage from the mapping scheme, the HCA returns a smaller virtual address space associated with the same R_Key.

REFERENCES:
patent: 5623622 (1997-04-01), Yuki et al.
patent: 6611883 (2003-08-01), Avery
patent: 6947970 (2005-09-01), Berry
patent: 7124170 (2006-10-01), Sibert
patent: 2003/0031183 (2003-02-01), Kashyap et al.
patent: 2003/0046505 (2003-03-01), Craddock et al.
patent: 2003/0093625 (2003-05-01), Beukema et al.

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